57. Taylor, Marlon D., and Dewell R. Gandy, "Caloric Cost of Rice and Wheat Program," Am J Agric Econ, November 1969. 58. Schultz, Theodore W., "Agricultural Modernization Altering World Food and Feed Grain Competition," The International Conference on Mechanized Dryland Farming, G. E. Van Riper, ed. Moline, 111.: John Deere and Company, August 1969. 59. Johnson, D. Gale, "Climatic and Crop Analogies for the Soviet Union: A Study of the Possibilities of Increasing Grain Yields," Ag. Econ. Paper No. 57:16, Univ. of Chicago, Chicago, 111., December 16, 1957. 60. Wickizer, V. D., and M. K. Bennett, The Rice Economy of Monsoon Asia. Stanford, Calif.: Food Research Institute, Stanford Univ. Press, 1941. 61. Ohkawa, Kazushi, Bruce F. Johnston, and Hiromitsu Kaneda, eds., Agri- culture and Economic Growth: Japan's Experience. Tokyo: Univ. of Tokyo Press, 1969. 62. David, M. H., Family Composition and Consumption. Amsterdam: North Holland Publishing Co., 1962. 63. Eizenga, W., Demographic Factors and Savings. Amsterdam: North Hol- land Publishing Co., 1961. 64. Leff, Nathaniel H., "Population Growth and Savings Potential." Prelimi- nary report to the Office of Program Coordination, Agency for International Development, Washington, D.C., 1967. (Forthcoming in Amer Econ Rev.} 65. Modigliani, Franco, "The Life Cycle Hypothesis of Saving, The Demand for Wealth and the Supply of Capital," Social Research, Summer 1966. 66. Tobin, James, "Life Cycle Savings and Balanced Growth," Ten Economic Studies in the Tradition of Irving Fisher, W. Fellner, et al., eds. New York: John Wiley & Sons, 1967. 67. Notestein, Frank W., "Population-The Long View," Food For the World, Theodore W. Schultz, ed. Chicago: Univ. of Chicago Press, 1945. pp. 36-57. 68. Gordon, John E., and John B. Wyon, Population Adaptation in Rural Punjab, India: The Khanna Study. Cambridge, Mass: Harvard Univ. Press, 1971., 1968.